CHAPTER 5 D I R E C T SUPPORT (INTERMEDIATE) MAINTENANCE INSTRUCTIONS

CHAPTER 5

D I R E C T SUPPORT (INTERMEDIATE) MAINTENANCE INSTRUCTIONS

Section I. GENERAL

5-1. scope

use following isolation of a J-SIIDS malfunction to

the grid wire sensor. However, the performance

This chapter provides specific instructions for all

standards contained in section V may be used at

maintenance functions authorized direct support

periodic intervals to check the ability of the grid wire

maintenance personnel by the maintenance alloca-

sensor to perform its intended mission.

tion chart (app B). Included is a description of

controls used by direct support maintenance per-

5-3. Direct Support Controls

sonnel, a list of test equipment required for total

Two pushbutton switches: one mounted under the

maintenance, troubleshooting and repair instruc-

junction box cover and the other mounted to the base

tions, and performance standards.

of the junction box are used by direct support

5-2. Purpose

maintenance personnel. The function of these

switches are described in paragraph 4-2.

These maintenance instructions are primarily for

Section II. TOOLS AND EQUIPMENT

5-4. Standard Tools and

5-5. Special Tools and Equipment

Equipment

No special tools and equipment are required for

Table 2-1 lists standard tools and test equipment

direct support maintenance of the grid wire sensor.

required at direct support maintenance level.

Section III. TROUBLESHOOTING

5-6. Visual Inspection

box at direct support level requires no special

procedures. The grid wire sensor schematic diagram,

Before troubleshooting the grid wire network and

figure 4-1, shows sufficient test points to check

junction box, make a thorough visual inspection.

open/short circuit impedance and continuity checks.

Check wiring insulation and components for evi-

The volt/ohmmeter listed in table 2-1 is recom-

dence of failure. Check interior for presence of

mended for making these checks. The location of

moisture and other foreign matter.

components is illustrated in figure Cl.

5-7. Troubleshooting

Troubleshooting the grid wire network and junction

Section IV. MAINTENANCE OF GRID WIRE SENSOR

repair facility. On site repair will normally consist of

5-8. scope

replacement of defective components only.

a. This section contains instructions for corrective

5-9. General Maintenance Instruction

maintenance of the grid wire sensor. The extent of

maintenance to be performed by direct support

a. In-Process Inspection. During repair, inspect

personnel is governed by the maintenance allocation

parts for defects not visible when the unit is

chart (app B) and allocation of parts (app C).

assembled. Continue the inspection during assembly

to assure that parts are properly assembled. During

b, Repair of the grid sire sensor will be limited to

- the repair process, inspect the grid wire sensor for

components located in the junction box and will be

the following:

performed either at the installation site or at the

5-1